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Re: arm64 kprobes patches
- From: "Frank Ch. Eigler" <fche at redhat dot com>
- To: Sandeepa Prabhu <sandeepa dot prabhu at linaro dot org>
- Cc: systemtap at sourceware dot org, William Cohen <wcohen at redhat dot com>, Masami Hiramatsu <masami dot hiramatsu dot pt at hitachi dot com>, Petr Machata <pmachata at redhat dot com>, Mark Wielaard <mjw at redhat dot com>, Deepak Saxena <dsaxena at linaro dot org>, Arnd Bergmann <arnd dot bergmann at linaro dot org>, "sandeepa dot prabhu at linux dot com" <sandeepa dot prabhu at linux dot com>
- Date: Thu, 27 Feb 2014 06:48:27 -0500
- Subject: Re: arm64 kprobes patches
- Authentication-results: sourceware.org; auth=none
- References: <CA+b37P175OWKXcQ-4SYb+AudxOJMe3OC5csoZognNuX7MOaTyQ at mail dot gmail dot com> <y0mzjldal1o dot fsf at fche dot csb> <CA+b37P2uxMb5q4=JoU7kJkCToyLOZ2F6Sn0JcLSdy3vrRPOcvQ at mail dot gmail dot com>
Hi -
On Thu, Feb 27, 2014 at 10:12:26AM +0530, Sandeepa Prabhu wrote:
> [...]
> Even on arm64, there are kernel functions that fails for kprobes,
> (example: memcpy, memset etc) that are referenced by kprobe handler
> themselves.
That is normal & fine, if "fails for kprobes" means only that the
kprobes refuse to be registered. A failure that brings down the
kernel is much worse.
- FChE